Stabilized solutions of metallic salts



Patented Oct. 23, 1951 STABILIZED SOLUTIONS OF METALLIC SALTS Stanley B. Elliott, Shaker Heights, and Raymond J. OHara, Maple Heights, Ohio, assignors to Ferro Enamel Corporation, Cleveland, Ohio, a

corporation of Ohio No Drawing. Application January 19, 1950, Serial No. 139,538

This invention relates as indicated to stabilized solutions of metallic salts useful in several arts such as paint and varnish driers, catalysts, lubricant additives, etc.

These metallic soaps are generally, in their pure state, solids and their commercial occurrence is usually in the form of liquid solutions in organic solvents such as mineral spirits. These solutions are then added to the appropriate paint or varnish or lubricant base, and it is accordingly a further requisite of such solutions that they be capable of incorporation in the base by a simple mixing operation.

In order for th metallic salt solutions to be thus capable of ready admixture, with a minimum amount of a solvent such as mineral spirits, they should have a relatively low viscosity so as to reduce to a minimum the time and effort required for blending.

The metallic soap solutions, particularly'those used as driers, either before or after admixture with the vehicle in which they are designed for use, come in contact with minor amounts of water present generally as a foreign material in the container. Such water generall results in a decomposition of the metallic salts, unless some stabilizing addition agent is used.

It is, therefore, a principal object of this invention to provide stabilizing agents which are elfective not only to thus prevent decomposition, but which also decreases the viscosity of the solution of the metallic salt, so that a maximum metal content may be incorporated in the ultimate vehicle with a minimum of mixing time and effort.

Other objects of the invention will appear as the description proceeds.

To the accomplishment of the foregoing and related ends, said invention then comprises the features hereinafter fully described and particularly pointed out in the claims, the following description setting forth in detail certain illustrative embodiments of the invention, these being indicative, however, of but a few of the various ways inwhich the principle of the invention may be employed.

Broadly stated this invention comprises the provision of a metallic salt composition which comprises a water insoluble soap of a metal and a stabilizer therefore, comprising a mono ester 11 Claims. (Cl. 106310) of maleic acid wherein the esterifying group em bodies not more than 8 carbon atoms.

The metals which may be used in the preparation of such metallic salts include the following:

Table I Heavy metals: Iron Copper Zinc Cadmium Manganese Cobalt* Nickel Lead Alkaline earth metals:

Calcium Barium Strontium The metals marked thus are effective, in general, as drier metals when used alone. The other listed metals, while not efiectiveas drier metals, alone, nevertheless can be used in conjunction with one of the marked metals. They also find use as bodying agents, plastic stabilizers, lubricant additives, etc.

The acids which may be used with any of the metals given in Table I above in the preparation of the metallic salts or soaps which comprise the compositions of this invention include the following representative acids:

Table II Commercially available acids which are, in many cases, mixtures of certain of the'above 3 named, together with small amounts of other acids, are generally useful in the preparation of metallic soap driers.

Any one or more of the metals previously iden tified may be used with an one or more of the acids named above in the preparation of metallic salts which form one component of the compositions of this invention. For best results, however, only those resultant salts or soaps which are soluble in a non-polar solvent such as any of the following. viz:

Table III Xylen Stoddards Solvent Benzene V. M. 8: P. naptha Toluene Mineral spirits should be used.

In the following table are given a number of specific examples of metallic salts which will be found highly useful, and to which this invention particularly relates:

Table IV The mono esters of maleic acid, when used in amounts of from 1 to parts of maleate to 100 parts of metallic soaps can reduce the viscosity of solutions of, for example, cobalt ormanganese naphthenate containing 6% metal from about 4 poises down to 0.6 or less. The mono ester can be added to the metallic soap before or after solution in the solvent, however, we have found it has been preferable to add it before solutionwith the solvent.

We have found that mono-hydric, dihydric and glycol ether alcohols containing up to 8 carbon atomsare useful in producing the mono esters of maleic acid which act as stabilizers and dispersants for soap solutions.

The mono esters of maleic acid which have been found particularly useful inthis invention are given in the following table:

Table V Methyl acid ester maleate Ethyl acid ester maleate Propyl acid ester maleate Butyl acid ester maleate Amyl acid ester maleate Hexyl acid ester maleate Heptyl acid ester maleate Octyl acid ester maleate Ethylene glycol acid ster maleate Di-ethylene glycol acid ester maleate Tri-ethylene glycol acid ester maleate Methyl cellosolve acid ester maleate Ethyl cellosolve acid ester maleate Propyl cellosolve acid ester maleate Butyl cellosolve acid ester maleate Amyl cellosolve acid ester maleate Various substances have been used in conjunction with metallic soap driers as stabilizers, and in one way or another have affected the drying properties of the driers. We have found that the stabilizer of the present invention in no way effects these drying properties and are therefore superior to any stabilizers previously used.

Other modes of applying the principle of the invention may be employed, change being made as regards the details described, provided the features stated in any of the following claims or the equivalent of such be employed.

We therefore, particularly point out and distinctly claim as our invention:

1. As a new composition of matter, an admixture consisting essentially of a water insoluble soap of a metal selected from the class of cadmium, manganese, cobalt, calcium and barium and from about 1 to 20 parts per partsv of such metallic soap of a compound corresponding to the general formula where R represents a member of the class consisting of the monohydric, dihydric and glycol ether alcohols containing not more than 8: carbon atoms.

2. As a new composition, of matter, an admixture consisting essentially of a.v Water insoluble soap of a metal selected from the. class of cad,- mium, manganese, cobalt, calcium, and barium, and from about 1 to 20 parts per 100 parts of such metallic soap of an alkyl acid meleate. wherein the alkyl group embodies not more than; 8 carbon atoms.

3. As a new composition of matter, an admixture consisting essentially of a water insoluble soap of a metal selected from the class of cad mium, manganese, cobalt, calcium, and barium and from about 1 to 20- parts per 100 parts of such metallic soap of an alky-ether acid ester maleate wherein the alkykl-ether group embodies not more than 8 carbon atoms.

4. As a new composition of matter, an admixture of a water insoluble soapof a metal selected from the class of cadmium, manganese, cobalt, calcium and barium and from about 1 to 20 parts per 100 parts of such metallic soap of propyl acid ester maleate.

5. As a new composition of matter, an admixture of a water insoluble soap of a metal selected from the class of cadmium, manganese, cobalt, calcium and barium and from 1 to 20 parts per 100 parts of such metallic soap of a butyl acid ester maleate. I

6; As a new composition of matter, an admixtureof a water insoluble soap of a metal selected from the class of cadmium, manganese, cobalt", calcium and barium and from 1 to 20 parts per 100 parts of such metallic soap of an ethylene glycol acid ester maleate.

7. As a new composition of matter, an admixture, of a water insoluble soap. of a metal selected from the class of cadmium, manganese, cobalt, calcium, and barium and from 1 to 20 parts per 100 parts of such metallic soap of a methyl cellosolve acid ester maleate.

8. A drier comprising a soap of a drying metal and from about 1 to 20 parts per 100 parts of such drier soap of an alkyl acid ester maleate:

wherein the alkyl group embodies not more than 8 carbon atoms.

9. A drier comprising a soap of a drying metal and from about 1 to 20 parts per 100 parts of such drier soap of an alkyl-ether acid ester maleate wherein the alkyl-ether group embodies not more than 8 carbon atoms.

10. A drier comprising a soap of a metal selected from, the class consisting of iron, manganese, cobalt, zinc, lead and calcium, a soap of group embodie not more than 8 carbon atoms.

11. A drier comprising a soapof a metal selected from the class consisting of iron, manganese, cobalt, zinc, lead and calcium, a soap of a metal selected from the class consisting of copper, cadmium, nickel, barium, and strontium, and from 1 to 20 parts per 100 parts of total soap of an alky-ether acid ester maleate wherein the alkyl-ether group embodies not more than 8 carbon atoms. I I

STANLEY B. ELLIOTT. RAYMOND J. OHARA.

REFERENCES CITED UNITED STATES PATENTS Name Date Elliott Dec. 11, 1945 Number 

1. AS A NEW COMPOSITION OF MATTER, AN ADMIXTURE CONSISTING ESSENTIALLY OF A WATER INSOLUBLE SOAP OF A METAL SELECTED FROM THE CLASS OF CADMIUM, MANGANESE, COBALT, CALCIUM AND BARIUM AND FROM ABOUT 1 TO 20 PARTS PER 100 PARTS OF SUCH METALLIC SOAP OF A COMPOUND CORRESPONDING TO THE GENERAL FORMULA 